Feature

Tailor-Made Weather Will Test Insects’ Endurance

Books of the Week

Whole Eggs Have Been Preserved by Freezing

New Machines and Gadgets

Front Matter

Vitamin $text{B}_{12}$ Aids Anemics

Pact Changes Call Signs

More Penicillin Planned at World Health Meeting

World Code against Making Doctors P.O.W.’s Is Asked

Pig Ill May Be Polio Clue

[Photograph]: New Synchrotron

Menhaden Is America’s Most-Caught Fish